public void testInvokeAnyImpl_noTaskCompletes() throws Exception {
    ListeningExecutorService e = newDirectExecutorService();
    List<Callable<String>> l = new ArrayList<>();
    l.add(new NPETask());
    try {
      invokeAnyImpl(e, l, false, 0, NANOSECONDS);
      fail();
    } catch (ExecutionException success) {
      assertThat(success).hasCauseThat().isInstanceOf(NullPointerException.class);